when I run it ,it throws the following error message:
Exception in thread "main" java.lang.NullPointerException
at
org.eclipse.birt.report.engine.api.impl.ReportEngine$EngineE xtensionManager. <init>(ReportEngine.java:794)
at
org.eclipse.birt.report.engine.api.impl.ReportEngine.<init>(ReportEngine.java:105)
at
org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$ 1.run(ReportEngineFactory.java:18)
at
org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$ 1.run(ReportEngineFactory.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at
org.eclipse.birt.report.engine.api.impl.ReportEngineFactory. createReportEngine(ReportEngineFactory.java:14)
at com.test.birt.report.MyReportCreator.main(MyReportCreator.ja va:24)